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Finding the Fourth Proportional to 326,668.40, 489,770.94 and 126,820.34

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Solution

The fourth proportional to 326,668.40, 489,770.94 and 126,820.34 is: 190,140.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,668.40 : 489,770.94 = 126,820.34 : x
  2. Step 2: Convert to fraction form
    326,668.40/489,770.94 = 126,820.34/x
  3. Step 3: Cross multiply
    326,668.40x = 489,770.94 × 126,820.34
  4. Step 4: Simplify right side
    326,668.40x = 62,112,917,132.92
  5. Step 5: Solve for x
    x = 62,112,917,132.92/326,668.40
  6. Step 6: Final answer
    x = 190,140.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.